mkvalidator reports items in cues are NOT found in cluster in matroska file generated by matroskamux 1.18.5

description: item in the Cues can't be found in Clusters

test file: eric_194744.mkv

analysis: This is from mkvinfo, it is one tool of the MKVToolNix. eric_194744.mkvinfo.txt

This is from mkvalidator. You can download this tool from mkvalidator eric_194744.validator.txt

Here is one example, Cluster timestamp is 00:00:01.290000000 but the first keyframe in this cluster is 00:00:01.291000000.

|+ Cluster
| + Cluster timestamp: 00:00:01.290000000
| + Cluster previous size: 205383
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:01.291000000
|  + Frame with size 102116
| + Simple block: track number 1, 1 frame(s), timestamp 00:00:01.324000000

at the same time, timestamp of the keyframe in Cue is 00:00:01.290000000, which mkvalidator reports can't find this item in cluster. more examples, please see eric_194744.validator.txt.

|+ Cues
| + Cue point
|  + Cue time: 00:00:00.000000000
|  + Cue track positions
|   + Cue track: 1
|   + Cue cluster position: 452
| + Cue point
|  + Cue time: 00:00:01.290000000
|  + Cue track positions
|   + Cue track: 1
|   + Cue cluster position: 511600

This issue was seen in GST 1.18.5. and we test GST 1.16.2, GST 1.16.2 works good.